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Explore Scientific 52° LER Eyepiece 15mm Argon Purged Eyepiece


Quick Overview

The Explore Scientific 52° LER Eyepiece 15mm Ar is an excellent choice for those wanting to use medium powers in their shorter focal length telescopes, or higher powers in medium to long focal ratio instruments. It's the ideal focal length for planetary, lunar and higher power double star observing through larger SCT and Maksutov telescopes. Argon-purged, this eyepiece is waterproof to stand up to the most challenging of observing conditions. It's LER - or Long Eye Relief - design of 16.3mm, means that even those who wear glasses to observe will find viewing through this range a comfortable and rewarding experience.
Only 75 left

Availability: In stock



Solidly in the mid-magnification range for most amateur telescopes, the Explore Scientific 52° LER Eyepiece 15mm Ar is a true workhorse for visual observers. If you love deep sky observing, eyepieces in this focal length range not only give healthy increases in magnification, but the contrast enhancement of giving a darker background sky can make all the difference of how galaxies and nebulae appear under suburban skies.

Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore Scientific 52° Series™ eyepieces are excellent flat-field multi-element oculars that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, these eyepieces offer incredible value in a very nice eyepiece. Expect exceptional quality and value versus a comparably priced Plossl.

Another great benefit of these eyepieces is the excellent contrast and ease with which you can gaze, not directly at an object, but slightly to either side. This skill, called using averted vision, is especially helpful when observing faint objects, because using averted vision puts the image on a part of your eye that is more sensitive to light, allowing you to see fainter images.


Focal length (mm)  15

Barrel size  1.25"

Lens/Group 5/3

FOV (°) 52

Eye relief (mm)  16.3

Diameter diaphragm  19.4


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